US3601370A - Continuously operating mixing and kneading machine - Google Patents

Continuously operating mixing and kneading machine Download PDF

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US3601370A
US3601370A US776418A US3601370DA US3601370A US 3601370 A US3601370 A US 3601370A US 776418 A US776418 A US 776418A US 3601370D A US3601370D A US 3601370DA US 3601370 A US3601370 A US 3601370A
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zone
shaft
housing
worm
channels
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US776418A
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Erwin Ruettener
Fritz Sutter
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Buss AG
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Buss AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
    • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
    • B29B7/40—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft
    • B29B7/42—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix
    • B29B7/426—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix with consecutive casings or screws, e.g. for charging, discharging, mixing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/268—Throttling of the flow, e.g. for cooperating with plasticising elements or for degassing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/68—Barrels or cylinders
    • B29C48/685—Barrels or cylinders characterised by their inner surfaces, e.g. having grooves, projections or threads
    • B29C48/687—Barrels or cylinders characterised by their inner surfaces, e.g. having grooves, projections or threads having projections with a short length in the barrel direction, e.g. pins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/76—Venting, drying means; Degassing means
    • B29C48/765—Venting, drying means; Degassing means in the extruder apparatus
    • B29C48/766—Venting, drying means; Degassing means in the extruder apparatus in screw extruders
    • B29C48/767—Venting, drying means; Degassing means in the extruder apparatus in screw extruders through a degassing opening of a barrel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/45—Axially movable screws

Definitions

  • W l- ATTORN product is to be processed into granules, calendered or otherwise further treated following this process,it is essential that any components present in solution in the product in the fonn of vaporior gas should be released from it and extracted, if the end-product is to meet high standards of quality, as is the case r for instance with plastics for gramophone record manufacture or for electrical insulators.
  • One possible method of effecting this would be to increase the temperature so as to reduce the viscosity of the product, thus facilitating the passage of the gas bubbles to the surface.
  • a second method of liberating the gas consists in subjecting the product to an abrupt drop in pressure, using a choke ring. As the product emerges in a thin layer between the choke ring and the shaft, it does indeed display an extended surface area with consequent facilitation of degassing, but if by reason of its elasticity or internal viscosity this thin layer immediately contracts again to form rolls with a reduced surface area, it is difficult to extract the gas. 1
  • the proposed mixing and kneading machine which embodies a continuous, rotating, reciprocating worm shaft mounted in a housing, is characterized by the fact that it is divided into a feeder zone with continuous worm channels; an initial pressure buildup zone with discontinuous worm channels and with kneading dogs additionally mounted in the housing; a detensioning and a reintroduction zone, both with continuous worm channels; and a second pressure buildup zone with discontinuous worm channels and with kneading dogs additionally mounted in the housing.
  • FIG. 1 shows a vertical longitudinal section of the mixing and kneading machine
  • FIG. '2 shows a top view, partially in section, of the mixing and kneading machine
  • FIG. 3 shows a view, partially in section, of the detensioning and reintroduction zone less shaft
  • FIG. 3a shows a cross section along the line A-A in FIG. 3.
  • a worm shaft 3 is borne in a housing 4 and is driven by a power unit not shown in detail, in such manner that it rotates and at the same time executes a reciprocating axial movement and in the manner as shown in [1.8. Pat. No. 3,367,635 to W.
  • the worm shaft 3 which extends throughout the entire housing 4 is-provided with continuous worm channels 13 over the length of the feeder zone 8. Over the length of the first pressure buildup zone 9, the worm channels 14 on the shaft 3 are discontinuous, but additional kneading dogs 15 are mounted in the housing (FIG. 3).
  • the end of the first pressure buildup mine is formed by a choke ring 16 mounted in the housing 4 and effecting a conical contraction oflthehousing diameter.
  • the shaft 3 is again provided with comma: ous worm-channels 17, while in the second pressure buildup ⁇ ; zone 12 it is again provided with continuous worm channels 18.
  • zone 12 In this second pressure buildup zone 12, too, the interior wall of the housing carries kneading dogs 19.
  • a flange-mounted discharge worm '20 At the exit from the second pressure buildup zone 12 is a flange-mounted discharge worm '20 in which if appropriate an additional degassing process within a degassing well 21 and a vacuum feed pipe 22 can take place.
  • a cutaway portion of the interior wall of the housing takes the shape of a segment of a circular cylinder inner lining, the axis of the said circular cylinder being angled in relation to the worm shaft 3 in the direction of the degassing well 5.
  • the segment edge thus formed is rounded off to the interior wall of the degassing well 5 with a radius tapering ofi in the direction of rotation of the shaft 3 to zero.
  • the product for processing in the form of powder, chips or granules or a mixture thereof, enters the feeder zone8 of the mixing and kneading machine by way of the infeed device 1 and the infeed opening 2.
  • the continuous worm channels 13 of the shaft 3 in the sector of this infeed zone 8 feed the product continuously and without intermediate halt into the first pressure buildup zone 9, where it is mixed and kneaded intensively and brought to high pressure. In this process the specific volume of the product is reduced. Account may be taken of this by filling out the interstices in the discontinuous worm channels 14 with channel occlusion elements 23. Thereafter the product proceeds into the area of the choke ring 16 and flows in a thin layer between the latter and the well 3 through into the detensioning zone 10. As a result of this the pressure sinks abruptly, thus releasing the components in gaseous form dissolved in the product, allowing them to rise up the degassing shaft and be drawn off into the vacuum feed pipe 6.
  • This zone 12 is similarly arranged to the initial pressure buildup zone .9, and here again the shaft is provided with continuous worm channels 18 and the interior wall of the housing with kneading dogs 19.
  • the zone 12 Close to the intake zone 11, the zone 12 is not completely filled out with the product. In this zone the product is repeatedly torn apart and pressed together again. This results in a very large product surface area which permits a correspondingly powerful additional extraction of gas.
  • the gas as it emerges is able to stream back through the gaps between the product and the worm channels 18 into the degassing shaft 5, against the direction of feed.
  • the compound movement of the shaft 3 made up of a rotating movement and an axial reciprocating movement considerably facilitates this retrograde gas stream and the layout of the intake zone 11 described ensures that the entire flow of product is transferred and no congestion arises in the degassing shaft 5. It is possible to supervise the proper functioning of the reintroduction zone through the inspection glass.
  • the material in the form of a powder with a low bulk weight was placed in the feeder hopper of a single-spindle continuous mixing and kneading machine with a reciprocating shaft and was brought to a condition of molten viscous plasticity by the application of heat and kneading, compressed under ascending pressure, detensioned and purged of volatile components, reintroduced into the worm by means of the proposed device and the pressure simultaneously built up again.
  • a continuously operating mixing and kneading machine comprising:
  • a rotating and reciprocating worm shaft 2. a housing surrounding said shaft provided with a feeder opening, a degassing well adapted for attachment .to vacuum means,
  • a reintroduction zone fonnedby continuous worm channels on said shaft following said detensioning zone ,.said reintroduction zone being formed with a cut away portion of the interior wall of said housing in the form of asegment of a circular cylinder having an axis thereof which is at an angle inrelation to the worm shaft and lies in the direction'of said degassing well,- the edge of said segment facing the/interior wall of the degassing well being.
  • a machine as claimed in claim 1 including channel occlusion elementswhich are rotatably moveable in and through the discontinuous worm channels to aid in compacting and reducing the volume of the mixture being kneaded.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

Continuously operating mixing and kneading machine embodying a continuous, rotating, reciprocating worm shaft mounted in a housing, which machine is divided into a feeder zone with continuous worm channels; an initial pressure buildup zone with discontinuous worm channels and with kneading dogs additionally mounted in the housing; a detensioning zone and a reintroduction zone, both with continuous worm channels; and a second pressure buildup zone with discontinuous worm channels and with kneading dogs mounted additionally in the housing.

Description

United States Patent inventors Erwin Ruettener Riehen; Fritz Sutter, Pratteln, both of, Switzerland Appl. No. 776,418 Filed Not/.48, 1968 Patented Aug. 24, 1971 Assignee Buss AG.
Basel, Switzerland Priority Nov. 20, 1967 Switzerland 16,330/67 CONTINUOUSLY OPERATING MIXING AND KNEADING MACHINE 2 Claims, 4 Drawing Figs.
US. Cl 259/5, 259/9 Int. Cl B0" 7/02, BOlf 13/04 Field oi'Search 259/4-10, 21,40,109, 110
,L H q 22 [56] References Cited UNITED STATES PATENTS 2,731,247 1/1956 Hudry 1. 259/6 3,031,030 4/1962 Rodenacker. 259/9 UX 3,219,320 11/1965 Sutter 259/5 3,224,739 12/1965 Schuur 259/4 3,346,242 10/1967 List 259/5 X 3,347,528 10/1967 List et al.... 259/10X 3,367,635 2/1968 Gresch 259/4 Primary Examiner-James Kee Chi Attorney-Abraham A. Saffitz PATENTED M1824 um SHEET 1 0F 3 INVENTORS:
Erwin RUETTENER and Fritz By M0441) s TTEB 32 mg l x INVENTORS: a: Erwin RUETTENER and Fritz SUTTER L yflulaw 41% ATTORN PATENTEU AUG24I97| 3.601. 370
sum 3 or 3 INVENTORS:
Erwin RUETTENER and Fritz S TTE By W l- ATTORN product is to be processed into granules, calendered or otherwise further treated following this process,it is essential that any components present in solution in the product in the fonn of vaporior gas should be released from it and extracted, if the end-product is to meet high standards of quality, as is the case r for instance with plastics for gramophone record manufacture or for electrical insulators. v
In ,what manner such products for release, hereinafter referred to as .gases, penetrated into the product is not of significance to the present problemDifficulties in extracting the gases from the product arise from the viscosity and elasticity of the latter. These properties obstruct the passage of the gases tojthe surface, the only situation in which the bubbles of gas can burst and release the gas.
One possible method of effecting this would be to increase the temperature so as to reduce the viscosity of the product, thus facilitating the passage of the gas bubbles to the surface.
This is often impossible, however, as certain products would not tolerate an adequately large rise in temperature.
A second method of liberating the gas consists in subjecting the product to an abrupt drop in pressure, using a choke ring. As the product emerges in a thin layer between the choke ring and the shaft, it does indeed display an extended surface area with consequent facilitation of degassing, but if by reason of its elasticity or internal viscosity this thin layer immediately contracts again to form rolls with a reduced surface area, it is difficult to extract the gas. 1
A further difficulty then arises in bringing these rolls back into the spiral channels of the worm. beforev they have remained so long in the degassing zone that they choke the latter or cause damage to the product, for example by reason of a protracted temperature effect.
The mixing and kneading machine now suggested not only I eliminates these disadvantages but additionally permits more effective degassing than is possibleby decompression of the product alone.
The proposed mixing and kneading machine, which embodies a continuous, rotating, reciprocating worm shaft mounted in a housing, is characterized by the fact that it is divided into a feeder zone with continuous worm channels; an initial pressure buildup zone with discontinuous worm channels and with kneading dogs additionally mounted in the housing; a detensioning and a reintroduction zone, both with continuous worm channels; and a second pressure buildup zone with discontinuous worm channels and with kneading dogs additionally mounted in the housing. One example of the execution of the subject of the invention is illustrated in the accompanying drawings, in which:
FIG. 1 shows a vertical longitudinal section of the mixing and kneading machine FIG. '2 shows a top view, partially in section, of the mixing and kneading machine FIG. 3 shows a view, partially in section, of the detensioning and reintroduction zone less shaft and FIG. 3a shows a cross section along the line A-A in FIG. 3.
A worm shaft 3 is borne in a housing 4 and is driven by a power unit not shown in detail, in such manner that it rotates and at the same time executes a reciprocating axial movement and in the manner as shown in [1.8. Pat. No. 3,367,635 to W.
' Gresch, dated Feb. 6, 1968.
closure of the degassing well being formed by. an inspectio glass 7 with an airtight fit.
2 The worm shaft 3 which extends throughout the entire housing 4 is-provided with continuous worm channels 13 over the length of the feeder zone 8. Over the length of the first pressure buildup zone 9, the worm channels 14 on the shaft 3 are discontinuous, but additional kneading dogs 15 are mounted in the housing (FIG. 3). The end of the first pressure buildup mine is formed by a choke ring 16 mounted in the housing 4 and effecting a conical contraction oflthehousing diameter.
Over the length of the detensioning zone 10 the reintroduction zone 11, the shaft 3 is again provided with comma: ous worm-channels 17, while in the second pressure buildup}; zone 12 it is again provided with continuous worm channels 18. In this second pressure buildup zone 12, too, the interior wall of the housing carries kneading dogs 19.
At the exit from the second pressure buildup zone 12 is a flange-mounted discharge worm '20 in which if appropriate an additional degassing process within a degassing well 21 and a vacuum feed pipe 22 can take place.
Within the reintroduction zone 11 a cutaway portion of the interior wall of the housing takes the shape of a segment of a circular cylinder inner lining, the axis of the said circular cylinder being angled in relation to the worm shaft 3 in the direction of the degassing well 5. The segment edge thus formed is rounded off to the interior wall of the degassing well 5 with a radius tapering ofi in the direction of rotation of the shaft 3 to zero.
The product for processing, in the form of powder, chips or granules or a mixture thereof, enters the feeder zone8 of the mixing and kneading machine by way of the infeed device 1 and the infeed opening 2.
The continuous worm channels 13 of the shaft 3 in the sector of this infeed zone 8 feed the product continuously and without intermediate halt into the first pressure buildup zone 9, where it is mixed and kneaded intensively and brought to high pressure. In this process the specific volume of the product is reduced. Account may be taken of this by filling out the interstices in the discontinuous worm channels 14 with channel occlusion elements 23. Thereafter the product proceeds into the area of the choke ring 16 and flows in a thin layer between the latter and the well 3 through into the detensioning zone 10. As a result of this the pressure sinks abruptly, thus releasing the components in gaseous form dissolved in the product, allowing them to rise up the degassing shaft and be drawn off into the vacuum feed pipe 6. However, the viscosity of the product pennits only a portion of the gas to escape from it. 1 The continuous worm channels 17 along the detensioning zone 10 feed the product onward without a halt through the reintroduction zone 11 and into the second pressure buildup zone 12.
This zone 12 is similarly arranged to the initial pressure buildup zone .9, and here again the shaft is provided with continuous worm channels 18 and the interior wall of the housing with kneading dogs 19.
Close to the intake zone 11, the zone 12 is not completely filled out with the product. In this zone the product is repeatedly torn apart and pressed together again. This results in a very large product surface area which permits a correspondingly powerful additional extraction of gas. The gas as it emerges is able to stream back through the gaps between the product and the worm channels 18 into the degassing shaft 5, against the direction of feed. The compound movement of the shaft 3 made up of a rotating movement and an axial reciprocating movement considerably facilitates this retrograde gas stream and the layout of the intake zone 11 described ensures that the entire flow of product is transferred and no congestion arises in the degassing shaft 5. It is possible to supervise the proper functioning of the reintroduction zone through the inspection glass.
As the product is fed onward through the second pressure buildup zone 12, the gaps in the product close up, it is again compressed and leaves the machine in a gently pulsating stream. In the flange-mounted discharge worm 20 directly following, which moves only in rotation, the pressure is completely equalized. At the transition point to the discharge wonn 20, where'the product is again tornapart and recompressed; it ispossible to carry out further degassing by means of the degassing pipe 21 and the vacuum feed pipe 22.
Using the device proposed and a viscous thermoplastic not behaving in accordance with Newtons principles of internal friction when in a plastic rhelogical condition, it has been found possible to operate the expulsion of volatile components with infinite variability within a range of ZOO-1,000 kg. per hour without any disadvantages appearing. The material in the form of a powder with a low bulk weight was placed in the feeder hopper of a single-spindle continuous mixing and kneading machine with a reciprocating shaft and was brought to a condition of molten viscous plasticity by the application of heat and kneading, compressed under ascending pressure, detensioned and purged of volatile components, reintroduced into the worm by means of the proposed device and the pressure simultaneously built up again.
What we claim is:
. l. A continuously operating mixing and kneading machine comprising:
1. a rotating and reciprocating worm shaft 2. a housing surrounding said shaft provided with a feeder opening, a degassing well adapted for attachment .to vacuum means,
3. a feeder zone belowsaid'feeder opening in said housing provided with continuous wormchannels, I I
4. an initial pressure buildup zone formed by discontifl 'ous worm channels on said shaft and kneading dogs attached and mounted to the inner wall of said housing to build up the mixing pressure from said feeder zone,
5.v a detensioning zone formed by continuous worm'channels on said shaft which follows the pressure buildup and releases the pressure buildup, g
. a reintroduction zone fonnedby continuous worm channels on said shaft following said detensioning zone ,.said reintroduction zone being formed with a cut away portion of the interior wall of said housing in the form of asegment of a circular cylinder having an axis thereof which is at an angle inrelation to the worm shaft and lies in the direction'of said degassing well,- the edge of said segment facing the/interior wall of the degassing well being.
rounded off with. a radius tapering ofi in the direction of rotation of the shaft of zero and 7. a second pressure buildup zone formed by discontinuous worm channels on said shaft and kneading dogs mounted within the housing. V
2. A machine as claimed in claim 1 including channel occlusion elementswhich are rotatably moveable in and through the discontinuous worm channels to aid in compacting and reducing the volume of the mixture being kneaded.

Claims (8)

1. A continuously operating mixing and kneading machine comprising: 1. a rotating and reciprocating worm shaft, 2. a housing surrounding said shaft provided with a feeder opening, a degassing well adapted for attachment to vacuum means, 3. a feeder zone below said feeder opening in said housing provided with continuous worm channels, 4. an initial pressure buildup zone formed by discontinuous worm channels on said shaft and kneading dogs attached and mounted to the inner wall of said housing to build up the mixing pressure from said feeder zone, 5. a detensioning zone formed by continuous worm channels on said shaft which follows the pressure buildup and releases the pressure buildup, 6. a reintroduction zone formed by continuous worm channels on said shaft following said detensioning zone, said reintroduction zone being formed with a cut away portion of the interior wall of said housing in the form of a segment of a circular cylinder having an axis thereof which is at an angle in relation to the worm shaft and lies in the direction of said degassing well, the edge of said segment facing the interior wall of the degassing well being rounded off with a radius tapering off in the direction of rotation of the shaft of zero and 7. a second pressure buildup zone formed by discontinuous worm channels on said shaft and kneading dogs mounted within the housing.
2. a housing surrounding said shaft provided with a feeder opening, a degassing well adapted for attachment to vacuum means,
2. A machine as claimed in claim 1 including channel occlusion elements which are rotatably moveable in And through the discontinuous worm channels to aid in compacting and reducing the volume of the mixture being kneaded.
3. a feeder zone below said feeder opening in said housing provided with continuous worm channels,
4. an initial pressure buildup zone formed by discontinuous worm channels on said shaft and kneading dogs attached and mounted to the inner wall of said housing to build up the mixing pressure from said feeder zone,
5. a detensioning zone formed by continuous worm channels on said shaft which follows the pressure buildup and releases the pressure buildup,
6. a reintroduction zone formed by continuous worm channels on said shaft following said detensioning zone, said reintroduction zone being formed with a cut away portion of the interior wall of said housing in the form of a segment of a circular cylinder having an axis thereof which is at an angle in relation to the worm shaft and lies in the direction of said degassing well, the edge of said segment facing the interior wall of the degassing well being rounded off with a radius tapering off in the direction of rotation of the shaft of zero and
7. a second pressure buildup zone formed by discontinuous worm channels on said shaft and kneading dogs mounted within the housing.
US776418A 1967-11-20 1968-11-18 Continuously operating mixing and kneading machine Expired - Lifetime US3601370A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT1046167A AT309789B (en) 1967-11-20 1967-11-20 Mixing and kneading device for plastic masses
CH1633067A CH456924A (en) 1967-11-20 1967-11-20 Continuously working mixing and kneading machine

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JP (1) JPS5122221B1 (en)
AT (1) AT309789B (en)
BE (1) BE724127A (en)
DE (1) DE1806638A1 (en)
FR (1) FR1592327A (en)
GB (1) GB1232669A (en)
NL (1) NL6816389A (en)
RO (1) RO54820A (en)
SE (1) SE368356B (en)
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Cited By (21)

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US3672641A (en) * 1970-09-14 1972-06-27 French Oil Mill Machinery Apparatus for removing liquids from elastomeric polymers
US3719350A (en) * 1971-03-22 1973-03-06 Baker Perkins Inc Self-cleaning venting section for continuous mixers
US4682475A (en) * 1985-01-24 1987-07-28 King-Seeley Thermos Co. Ice making apparatus
US6103839A (en) * 1998-05-11 2000-08-15 Nalco Chemical Company Horizontally flowing continuous free radical polymerization process for manufacturing water-soluble polymers from monomers in aqueous solution
US20050073906A1 (en) * 2003-08-21 2005-04-07 Ngk Insulators, Ltd. Screw for extruder, screw extruder, and kneading extruder using the screw extruder
US20070100053A1 (en) * 2002-08-12 2007-05-03 Chapman Bryan R Plasticized polyolefin compositions
US20080317990A1 (en) * 2003-08-12 2008-12-25 Exxonmobil Chemical Company Inc. Crosslinked polyethylene articles and processes to produce same
US7875670B2 (en) 2002-08-12 2011-01-25 Exxonmobil Chemical Patents Inc. Articles from plasticized polyolefin compositions
US7985801B2 (en) 2002-08-12 2011-07-26 Exxonmobil Chemical Patents Inc. Fibers and nonwovens from plasticized polyolefin compositions
US7998579B2 (en) 2002-08-12 2011-08-16 Exxonmobil Chemical Patents Inc. Polypropylene based fibers and nonwovens
US8003725B2 (en) 2002-08-12 2011-08-23 Exxonmobil Chemical Patents Inc. Plasticized hetero-phase polyolefin blends
WO2012146240A3 (en) * 2011-04-27 2012-12-20 Troester Gmbh & Co. Kg Method and device for producing a rubber component
RU2471541C1 (en) * 2011-07-12 2013-01-10 Открытое акционерное общество "Научно-исследовательский институт полимерных материалов" Explosive compound components mixer
US8389615B2 (en) 2004-12-17 2013-03-05 Exxonmobil Chemical Patents Inc. Elastomeric compositions comprising vinylaromatic block copolymer, polypropylene, plastomer, and low molecular weight polyolefin
US8513347B2 (en) 2005-07-15 2013-08-20 Exxonmobil Chemical Patents Inc. Elastomeric compositions
CN103895119A (en) * 2012-12-27 2014-07-02 日东电工株式会社 Process for producing resin composition for optical semiconductor
CN103895121A (en) * 2012-12-27 2014-07-02 日东电工株式会社 Mixing device
RU182055U1 (en) * 2018-05-28 2018-08-01 Акционерное общество "Научно-исследовательский институт полимерных материалов" Mixer for mixing explosive components
USD938500S1 (en) * 2018-05-18 2021-12-14 Buss Ag Mixing and kneading machine
US20220001589A1 (en) * 2018-11-22 2022-01-06 Buss Ag Mixing and Plasticating Machine Having Effective Venting in the Region of the Feed, and Method Related Thereto
US11247185B2 (en) * 2018-02-05 2022-02-15 Köllemann Gmbh Device for the successive introduction of additives into a polymer granulate and use of the device

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US3672641A (en) * 1970-09-14 1972-06-27 French Oil Mill Machinery Apparatus for removing liquids from elastomeric polymers
US3719350A (en) * 1971-03-22 1973-03-06 Baker Perkins Inc Self-cleaning venting section for continuous mixers
US4682475A (en) * 1985-01-24 1987-07-28 King-Seeley Thermos Co. Ice making apparatus
US6103839A (en) * 1998-05-11 2000-08-15 Nalco Chemical Company Horizontally flowing continuous free radical polymerization process for manufacturing water-soluble polymers from monomers in aqueous solution
US8211968B2 (en) 2002-08-12 2012-07-03 Exxonmobil Chemical Patents Inc. Plasticized polyolefin compositions
US8217112B2 (en) 2002-08-12 2012-07-10 Exxonmobil Chemical Patents Inc. Plasticized polyolefin compositions
US20070100053A1 (en) * 2002-08-12 2007-05-03 Chapman Bryan R Plasticized polyolefin compositions
US7619027B2 (en) * 2002-08-12 2009-11-17 Exxonmobil Chemical Patents Inc. Plasticized polyolefin compositions
US7875670B2 (en) 2002-08-12 2011-01-25 Exxonmobil Chemical Patents Inc. Articles from plasticized polyolefin compositions
US8003725B2 (en) 2002-08-12 2011-08-23 Exxonmobil Chemical Patents Inc. Plasticized hetero-phase polyolefin blends
US7985801B2 (en) 2002-08-12 2011-07-26 Exxonmobil Chemical Patents Inc. Fibers and nonwovens from plasticized polyolefin compositions
US7998579B2 (en) 2002-08-12 2011-08-16 Exxonmobil Chemical Patents Inc. Polypropylene based fibers and nonwovens
US8192813B2 (en) 2003-08-12 2012-06-05 Exxonmobil Chemical Patents, Inc. Crosslinked polyethylene articles and processes to produce same
US20080317990A1 (en) * 2003-08-12 2008-12-25 Exxonmobil Chemical Company Inc. Crosslinked polyethylene articles and processes to produce same
US20110111153A1 (en) * 2003-08-12 2011-05-12 Exxonmobil Chemical Company Inc. Crosslinked polyethylene process
US8703030B2 (en) 2003-08-12 2014-04-22 Exxonmobil Chemical Patents Inc. Crosslinked polyethylene process
US20050073906A1 (en) * 2003-08-21 2005-04-07 Ngk Insulators, Ltd. Screw for extruder, screw extruder, and kneading extruder using the screw extruder
US8389615B2 (en) 2004-12-17 2013-03-05 Exxonmobil Chemical Patents Inc. Elastomeric compositions comprising vinylaromatic block copolymer, polypropylene, plastomer, and low molecular weight polyolefin
US8513347B2 (en) 2005-07-15 2013-08-20 Exxonmobil Chemical Patents Inc. Elastomeric compositions
WO2012146240A3 (en) * 2011-04-27 2012-12-20 Troester Gmbh & Co. Kg Method and device for producing a rubber component
RU2471541C1 (en) * 2011-07-12 2013-01-10 Открытое акционерное общество "Научно-исследовательский институт полимерных материалов" Explosive compound components mixer
CN103895119A (en) * 2012-12-27 2014-07-02 日东电工株式会社 Process for producing resin composition for optical semiconductor
CN103895121A (en) * 2012-12-27 2014-07-02 日东电工株式会社 Mixing device
US11247185B2 (en) * 2018-02-05 2022-02-15 Köllemann Gmbh Device for the successive introduction of additives into a polymer granulate and use of the device
USD938500S1 (en) * 2018-05-18 2021-12-14 Buss Ag Mixing and kneading machine
USD966356S1 (en) 2018-05-18 2022-10-11 Buss Ag Mixing and kneading machine
RU182055U1 (en) * 2018-05-28 2018-08-01 Акционерное общество "Научно-исследовательский институт полимерных материалов" Mixer for mixing explosive components
US20220001589A1 (en) * 2018-11-22 2022-01-06 Buss Ag Mixing and Plasticating Machine Having Effective Venting in the Region of the Feed, and Method Related Thereto

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Publication number Publication date
SE368356B (en) 1974-07-01
SU521831A3 (en) 1976-07-15
RO54820A (en) 1973-06-11
BE724127A (en) 1969-05-02
DE1806638A1 (en) 1969-06-12
JPS5122221B1 (en) 1976-07-08
FR1592327A (en) 1970-05-11
GB1232669A (en) 1971-05-19
NL6816389A (en) 1969-05-22
AT309789B (en) 1973-09-10

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